All of the planets in this paper were identified in by-eye
searches of KMT events that were announced by the KMT AlertFinder
[1]} as the 2021 season progressed.
As described in Paper I, KMTNet observes
from three 1.6m telescopes that are equipped with
\((2^\circ \times 2^\circ )\)  cameras at CTIO in Chile (KMTC),
SAAO in South Africa (KMTS), and SSO in Australia (KMTA), mainly
in the \(I\)  band, with 60 second exposures, but with 9% of the
observations in the \(V\)  band.
The data were reduced using pySIS [2]}, a form of
difference image analysis (DIA,[3]}, [4]}). For publication,
the light curves were re-reduced using the tender-loving care
(TLC) version of pySIS.
For each event, we manually examined the images during the anomaly
to rule out image artifacts as a potential explanation for the
light-curve deviations.
